Printer&#39;s furniture



D. A. HAMPSON.

PRINTERS FURNITURE.

APPLICATION FILED Auma, I9I9.

,336J 23. Patented Apr. 6, 1920 l UL 22 A ,7 I. ll, wl l [Z11 "HQ, j

INVENTOR BY MM ATTORNEY UNITED STATES PATENT OFFICE.

DONALD A. HAMPS ON, OF MIDDLETO\VN, NEVI YORK, ASSIGNOR TO MORGANS &\VILCOX MFG. COMPANY, Oli MIDDLETOWN, NEW YORK, A CORPORATION OF NEWYORK.

'ramrnas' FURNITURE.

Application filed August 13, 1919.

To alt who/1t it may concern:

Be it known that I, DoxALD A. HAMrsoN, a citizen of the United States,residing at Middletown, in the county of Orange and State of New York,have invented a certain new and useful Improvement in PrintersFurniture, of which the following is a speclfication.

The invention relates to furniture and quoins, and more particularly tojob locks in which the separation of the base and head members inlocking-up is effected by a screw on one member having ratchet threadsengaged by spring actuated dogs on the other member, serving both aspawls for the ratchet and as a nut for the screw.

The mainobject of the invention is to provide a job-lock of thischaracter in which the releasing means for operating the dogs, is soarranged as to occupy but little space and thusgreatly reduce the widthof the job-lock and permit it to be employed in narrow spaces inlocking-up a form.

Another important object is to present such releasing means in positionfor convenient and easy operation, and to apply the spring force throughsuch means instead of directly upon the dogs.

The invention consists in certain novel features and details ofconstruction and arrangement by which the above objects are attained, tobe hereinafter described and claimed.

The accompanying drawings form-apart of this specification and show anapproved form of the invention' Figure 1 is a plan or face view of theimproved lock.

Fig. is a. vertical section taken on the line 22'in Fig. 1, and partlyin elevation.

Fig. 3 is a face view corresponding to Fig. 1, and partly in horizontalsection.

Fig. f is a perspective view of one of the dogs alone.

Fig. 5 is a perspective view of one'of the slides for operating thedogs.

Similar letters of reference indicate the same parts in all the figures.

The lock comprises two main portions. a base A and head B. the formerhaving posts or extensions A at each side in which are cylindrical holesreceiving corresponding arms B on the head, serving to guide the membersand permit the lock to be expanded or contracted in. width by moving thehead Specification of Letters Patent.

Patented Apr. 6, 1920.

Serial No. 317,249.

and base relatively to each other. The outer faces of both are plane andparallel and adapted to abut against the matter on one side and theinner face of the chase at the other. The posts A are connected by ahollow bridge A in which is received the screw C and the pawls or dogsD.

The screw is rotatably attached to the head B and extends midway betweenand parallel with the arms B Its threads are conical or angularlytapered, and it is adapted to serve both as a screw and as a cylindricalratchet engaged by correspondingly shaped teeth on the adjacent faces ofthe oppositely placed dogs D pivotally mounted at one end on pins Dextending through the bridge at points near the outer face of the baseA.

Each dog is provided with a hole or recess (Z, beyond the pivot D inwhich is received a finger F on an arm F of a slide F.

The latter is preferably shaped of a narrow strip of metal bent inapproximately U-form to embrace or partially inclose the base at oneside. The base is grooved longi tudinally on its upper and lowersurfaces, as at (6?, and the grooves receive the long arm F on one suchface and the short arm F on the other face, the long arm of one slidelying on one such face and that of the other slide on the opposite faceas shown, to permit the slides to be forced toward each other withoutinterference in the act of swinging the dogs D on their pins D throughthe connection of the fingers F The bight of the slide F connecting thearms F F is provided at the center with a teat or slight protuberance Fserving as a point of engagement for one end of a helical expansionspring Gr abutting at the opposite end against the adjacent post A inwhich it is received and held in a recess 0 The fingers F are engagedeach with the dog D beyond the screw C so that the expansive effect ofthe springs G is to draw both dogs as a divided nut, into engagementwith the threads of the screw, and to yield by drawing the slidesinwardly and permit the dogs to act as pawls in separating the head andbase.

The screw C has a knurled head C by which it may be turned by thefingers in adjusting the lock between the matter and chase and isprovided with recesses 0 adapted to receive a pin or analogousimplement. not shown, serving as a lever by which the ger to insureproper bearing and location,

and the required strong pressure attained by inserting the pin, notshown, in the recesses c and forcibly turning the screw,

.To release the lock the screw is relaxed by a reverse movement of thepin, and the slides F are both grasped between the finger and thumb andpressed inwardly to ward each other to swing the dogs D out ofengagement with the screw, the members then may be easily and quicklyforced together and the loekremoved.

It will be noted that the arrangement allows the lock to be quite narrowwhile permitting wide expansion, and that the slides I permit theapplication of the thumb and finger unobstructedly in effecting release.By locating the springs G between the slides and'base, theyare wellprotected and also easily accessible for renewal. The slides may be ofsteel or other metal having sufficient resilience to permit theengagement of their fingers with the dogs by simply springing theirarms? F apart far enough to effect such engagement.

In a device of the character set forth, relatively movable head and basemembers, and guiding means therefor, a screw rotatablv mounted in ,saidhead member, dogs having teeth matching :to the threads of said "screwand pivotally'fmounted in said base member, and spring'actuated slideson said base, connected to said dogs for swingin the latter out of engaement with said a V V L e screw.

2; In a device of the character set forth, relatively movable head andbase'members,

and guiding means therefor, a screw rotatably mounted in said headmember, dogs having teeth matching to the threads of said screw andpivotally mounted in said base member on opposite sides of said screw,slides on said base member each partially inclosing the latter andconnected to the op; posite dog, and a spring for each slide tending toforce its slide outwardly and draw said dogs toward each other.

3. In a device of the character set forth, relatively movable head andbase members, and guiding means therefor,fa screw rotatably mounted insaid head member, dogs having teeth matching to the threads of saidscrew and pivotally mounted in said base member on opposite sides ofsaid screw, slides each having arms received and guided in grooves insaid base member, a-finger on one of said arms engaged with the oppositedog, and a helical expansion spring between each of said slides and saidbase. 7

4. In a device of the character set forth, relatively movable head andbase members, and guiding means therefor, a screw 7 rotatably mounted insaid head member and having angular conicalthreads adapted to serve as aratchet, dogs ha ving teeth match ing to such threads and pivotallymounted in said base member on opposite sides of said screw, slideshavingarms received and guided in grooves in said base member andlocated on oppositefaces ofsaid base member, a finger'on one of saidarms of each of said slides, engaged in a recess in the'opposite of saiddogs, and a helical expansion spring between each of said slides andsaid ,base, tending througlrsaid "slides to' draw said dogs intoengagement with said screw.

In testimony that I claim'the invention 7 above set forth I aflix mysignature, in, presence of two witnesses.

r DONALD A. HAMPSON;

Witnesses: V p V x r FLOYD W; MoReA s, RICHARD KNIGHT.

